From mboxrd@z Thu Jan  1 00:00:00 1970
From: j.vimal@gmail.com (Vimal)
Date: Fri, 11 Mar 2011 10:29:08 -0800
Subject: Create a one-to-many tunnel
Message-ID: <AANLkTi=R_qSAzxTdk9pV0yLrDqq-3yrw0FLti2D_Yg0v@mail.gmail.com>
To: kernelnewbies@lists.kernelnewbies.org
List-Id: kernelnewbies.lists.kernelnewbies.org

Hi,

I wish to create an IP in IP tunnel interface that works as follows:

At the sender:
* The interface checks the dst IP address on the IP packet that it receives.
* It encapsulates the IP packet inside another IP packet with:
   Field 1: source address = the interface's IP address
   Field 2: dst address = the packet's dst IP address
* The interface now transmits the packet

This is different from normal IPinIP tunnels because it is not
point-to-point.  The operation in Field 2 is similar to NAT.  Also,
this is different from SNAT, because I want the receiver to know what
the original source IP.

At the receiver, assume that there is a stack that understands this
special IPinIP packet and has a way to handle it.

If it's too specific, then I do not mind implementing it.

Thanks,
-- 
Vimal